CVE-2026-42461

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.3% (70th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3

Also known asEUVD-2026-28897 (ENISA EUVD) · GHSA-cxx3-hr75-4q96 (GitHub Security Advisories) · GO-2026-5340 (OSV.dev)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to version 1.18.0, four GET endpoints under /api/templates* in Arcane's Huma backend are registered without any Security requirement, allowing any unauthenticated network client to list and read the full Compose YAML and .env content of every custom template stored in the instance. Because Arcane's UI exposes a "Save as Template" flow on the project / swarm-stack creation pages that persists the operator's real env content (database passwords, API keys, etc.) verbatim, this missing authorization is an unauthenticated read of operator secrets in practice — not a theoretical info-disclosure. The frontend explicitly treats /customize/templates/* as an authenticated area (PROTECTED_PREFIXES in frontend/src/lib/utils/redirect.util.ts), and every CRUD operation (POST/PUT/DELETE) on the same paths requires a Bearer/API key, so this is a clear backend authorization gap, not intended public access. This issue has been patched in version 1.18.0.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.3%
EPSS %ILE
70th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
1.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-07). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 9, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated May 9, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Unauthenticated Disclosure of Custom Compose Template Content (incl. `.env` secrets) · Advisory · getarcaneapp/arcane · GitHub

https://github.com/getarcaneapp/arcane/security/advisories/GHSA-cxx3-hr75-4q96
Web page

Release v1.18.0 · getarcaneapp/arcane · GitHub

https://github.com/getarcaneapp/arcane/releases/tag/v1.18.0

Vendor Advisories for CVE-2026-42461(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
gogithub.com/getarcaneapp/arcane/backend @ 1.18.0 (fixes < 1.18.0)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/getarcaneapp/arcane/backend—
  • every version up to 1.18.0: fixed in 1.18.0
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 32× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 210 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 110 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:52 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  3. 2026-11-11 16:39 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  4. 2026-11-10 16:44 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  5. 2026-11-09 16:35 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  6. 2026-11-08 16:39 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  7. 2026-11-08 09:18 UTCEchelonGraph re-scored
  8. 2026-11-08 09:18 UTCGHSA enrichmentGHSA-cxx3-hr75-4q96 · GitHub severity HIGH
  9. 2026-11-07 16:39 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  10. 2026-11-06 16:37 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  11. 2026-11-05 16:37 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  12. 2026-11-04 16:35 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  13. 2026-11-03 16:48 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  14. 2026-11-02 16:44 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  15. 2026-11-01 16:34 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  16. 2026-11-01 07:50 UTCGHSA enrichmentGHSA-cxx3-hr75-4q96 · GitHub severity HIGH
  17. 2026-11-01 03:01 UTCEchelonGraph re-scored
  18. 2026-10-31 16:32 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  19. 2026-10-30 16:34 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  20. 2026-10-29 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  21. 2026-10-28 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  22. 2026-10-27 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  23. 2026-10-26 16:31 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  24. 2026-10-25 16:33 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  25. 2026-10-25 14:29 UTCEchelonGraph re-scored
Show 75 more
  1. 2026-10-24 20:42 UTCEchelonGraph re-scored
  2. 2026-10-24 16:33 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  3. 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  4. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  5. 2026-10-21 16:33 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  6. 2026-10-20 16:33 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  7. 2026-10-19 16:32 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  8. 2026-10-18 16:32 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  9. 2026-10-18 03:41 UTCEchelonGraph re-scored
  10. 2026-10-17 16:34 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  11. 2026-10-17 14:26 UTCEchelonGraph re-scored
  12. 2026-10-16 16:42 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  13. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  14. 2026-10-14 16:33 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  15. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  16. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  17. 2026-10-12 16:07 UTCEchelonGraph re-scored
  18. 2026-10-11 19:49 UTCEchelonGraph re-scored
  19. 2026-10-11 17:03 UTCEchelonGraph re-scored
  20. 2026-10-11 14:29 UTCEchelonGraph re-scored
  21. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  22. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
  23. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  24. 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  25. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  26. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  27. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  28. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  29. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  30. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  31. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  32. 2026-09-30 07:28 UTCOSV refresh
  33. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  34. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
  35. 2026-09-23 17:53 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  36. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  37. 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  38. 2026-09-17 19:31 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  39. 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  40. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  41. 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  42. 2026-09-12 15:01 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  43. 2026-09-11 14:53 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  44. 2026-09-11 12:53 UTCOSV refresh
  45. 2026-09-11 09:37 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  46. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  47. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  48. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  49. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  50. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  51. 2026-09-02 14:12 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  52. 2026-09-01 13:54 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  53. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  54. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  55. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  56. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  57. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  58. 2026-08-25 13:49 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  59. 2026-08-23 18:50 UTCEchelonGraph re-scored
  60. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  61. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  62. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  63. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  64. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  65. 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  66. 2026-08-17 11:27 UTCEchelonGraph re-scored
  67. 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  68. 2026-08-16 04:31 UTCEchelonGraph re-scored
  69. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  70. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  71. 2026-08-14 03:05 UTCEchelonGraph re-scored
  72. 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  73. 2026-08-12 16:41 UTCEchelonGraph re-scored
  74. 2026-08-12 13:51 UTCEPSS rescoreEPSS 1.1% · 61st percentile
  75. 2026-08-11 15:50 UTCEchelonGraph re-scored

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2026/CVE-2026-42461.yaml
    Published Aug 11, 2026

    Arcane < 1.18.0 - Unauthenticated Template and Env Disclosure

    Open source ↗

Frequently asked(5)

What is CVE-2026-42461?
CVE-2026-42461 is a high-severity vulnerability; its CVE record was published on May 9, 2026. Arcane is an interface for managing Docker containers, images, networks, and volumes. Prior to version 1.18.0, four GET endpoints under /api/templates* in Arcane's Huma backend are registered without any Security requirement, allowing any unauthenticated network client to list and read the full…
When was the CVE record for CVE-2026-42461 published?
The CVE record for CVE-2026-42461 was published on May 9, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 24, 2026; the record at its source may have been updated since.
Is CVE-2026-42461 actively exploited?
CVE-2026-42461 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.3% probability of exploitation in the next 30 days (70th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42461?
CVE-2026-42461 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-42461?
A fix for CVE-2026-42461 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-42461 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-42461

Explore →

Is Your Infrastructure Affected by CVE-2026-42461?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.